13000636 has 24 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 5598000.

The previous prime is 13000633. The next prime is 13000651. The reversal of 13000636 is 63600031.

13000636 = 138² + 139² + ... + 346².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6940 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^13000636 is an apocalyptic number.

It is an amenable number.

13000636 is an abundant number, since it is smaller than the sum of its proper divisors (13126724).

13000636 is a wasteful number, since it uses less digits than its factorization.

13000636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15585 (or 15583 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 13000636 is about 3605.6394717165. The cubic root of 13000636 is about 235.1373031938.

Adding to 13000636 its reverse (63600031), we get a palindrome (76600667).

The spelling of 13000636 in words is "thirteen million, six hundred thirty-six", and thus it is an aban number.